diff --git a/main.go b/main.go
index 9e5b06e..d0e7e9e 100644
--- a/main.go
+++ b/main.go
@@ -56,7 +56,7 @@ var (
 	//go:embed assets/*
 	f embed.FS
 
-	monitorWidth, monitorHeight = ebiten.ScreenSizeInFullscreen()
+	monitorWidth, monitorHeight = ebiten.Monitor().Size()
 
 	cfg = &Config{}